18940055055066 has 40 divisors (see below), whose sum is σ = 42815326070484. Its totient is φ = 6257481310080.

The previous prime is 18940055055037. The next prime is 18940055055071. The reversal of 18940055055066 is 66055055004981.

18940055055066 is a `hidden beast` number, since 1 + 89 + 4 + 0 + 0 + 5 + 5 + 0 + 550 + 6 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 13880996969841 + 5059058085225 = 3725721^2 + 2249235^2 .

It is a super-2 number, since 2×18940055055066² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 517299925 + ... + 517336536.

Almost surely, 2^{18940055055066} is an apocalyptic number.

18940055055066 is an abundant number, since it is smaller than the sum of its proper divisors (23875271015418).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18940055055066 is a wasteful number, since it uses less digits than its factorization.

18940055055066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1034636588 (or 1034636579 counting only the distinct ones).

The product of its (nonzero) digits is 6480000, while the sum is 54.

The spelling of 18940055055066 in words is "eighteen trillion, nine hundred forty billion, fifty-five million, fifty-five thousand, sixty-six".